CVE-2025-12239
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk56th percentile - higher than 56% of all known CVEs
Summary
A buffer overflow vulnerability was identified in TOTOLINK A3300R in the setDdnsCfg function of /cgi-bin/cstecgi.cgi. The attack may be performed remotely, and the exploit has been made publicly available.
Risk Assessment
A remote attack could allow arbitrary code execution or cause device crash, potentially compromising network security.
Recommendation
Update the device firmware and restrict access to the administrative interface.
Other vulnerabilities in TOTOLINK A3300R
See all- CVE-2023-37173Critical
The TOTOLINK A3300R device in version V17.0.0cu.557_B20221024 was found to contain a command injection vulnerability via the command parameter in the setTracerouteCfg function.
- CVE-2023-37172Critical
A command injection vulnerability was discovered in the TOTOLINK A3300R device version V17.0.0cu.557_B20221024 via the ip parameter in the setDiagnosisCfg function.
- CVE-2023-37171Critical
The TOTOLINK A3300R device version V17.0.0cu.557_B20221024 was found to contain a command injection vulnerability via the admuser parameter in the setPasswordCfg function.
- CVE-2023-37170Critical
The TOTOLINK A3300R device version V17.0.0cu.557_B20221024 has been found to contain an unauthenticated remote code execution (RCE) vulnerability via the lang parameter in the setLanguageCfg function.
- CVE-2023-31729Critical
TOTOLINK A3300R router firmware v17.0.0cu.557 is vulnerable to Command Injection via the /cgi-bin/cstecgi.cgi CGI script. An attacker can remotely execute arbitrary system commands without authentication.
- CVE-2026-5679Medium
A vulnerability was detected in Totolink A3300R 17.0.0cu.557_B20221024 allowing OS command injection via the vsetTr069Cfg function in /cgi-bin/cstecgi.cgi. The attack can be launched remotely and the exploit is publicly available.
- CVE-2025-12260High
A stack-based buffer overflow vulnerability was found in TOTOLINK A3300R in the setSyslogCfg function of /cgi-bin/cstecgi.cgi, caused by manipulation of the enable argument. The attack can be launched remotely, and the exploit has been publicly disclosed.
- CVE-2025-12259High
A stack-based buffer overflow vulnerability was found in TOTOLINK A3300R in the setScheduleCfg function of /cgi-bin/cstecgi.cgi, caused by manipulation of the recHour argument. The attack can be initiated remotely, and the exploit has been published.
- CVE-2025-12258High
A stack-based buffer overflow vulnerability was detected in TOTOLINK A3300R in the setOpModeCfg function of /cgi-bin/cstecgi.cg, caused by manipulation of the opmode argument. The attack may be performed remotely.
- CVE-2025-12241High
A vulnerability was detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This impacts the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument lang results in stack-based buffer overflow. The attack can be launched remotely, and the exploit is now public.
Original NVD description (English source)
A weakness has been identified in TOTOLINK A3300R 17.0.0cu.557_B20221024. The impacted element is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Executing manipulation can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be exploited.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS